Euclid frequently used the method of proof by contradiction, and therefore the traditional presentation of Euclidean geometry assumes classical logic, in which every proposition is either true or false, i. e., for any proposition P, the proposition " P or not P " is automatically true.

This is frequently the method used to win games at higher levels, since a double threat is about as dangerous as a tessera ( which could be considered a form of double threat ).

File servers may also be categorized by the method of access: Internet file servers are frequently accessed by File Transfer Protocol ( FTP ) or by HTTP ( but are different from web servers, that often provide dynamic web content in addition to static files ).

This is in contrast to the seedbed method used more commonly in domestic gardening or more specific ( modern ) agricultural scenarios where the seed is applied beneath the soil surface and monitored and manually tended frequently to ensure more successful growth rates and better yields.

Modern historians use it much more frequently than the Romans themselves did ; the dominant method of identifying Roman years was to name the two consuls who held office that year.

Leonardo Da Vinci is frequently credited with introducing the idea of contact lenses in his 1508 Codex of the eye, Manual D, where he described a method of directly altering corneal power by submerging the eye in a bowl of water.

Thyroid nodules is a major presentation of thyroid neoplasms, and is diagnosed by ultrasound guided fine needle aspiration ( USG / FNA ) or frequently by thyroidectomy ( surgical removal and subsequent histological examination ). FNA is the most cost-effective and accurate method of obtaining a biopsy sample.

The ethnographic method is used across a range of different disciplines, primarily by anthropologists but also frequently by sociologists.

The template method occurs frequently, at least in its simplest case, where a method calls only one abstract method, with object oriented languages.

When it is not known exactly when a person develops the disease in question, epidemiologists frequently use the actuarial method, and assume it was developed at a half-way point between follow-ups.

A wireless transmission method is a logical choice to network a LAN segment that must frequently change locations.

A consequence of the differential drag method is that if the aircraft manoeuvers frequently then it will frequently create drag.

It is frequently measured using the method of survey sampling.

The method is frequently used for conditionally invoking test / debugging code without requiring additional computational overhead for every input / output cycle.

The method was frequently used for testing ' first time ' conditions, as in this suitably commented IBM / 360 assembler example.

Building upon Buckley's principles of hard work in training, exceptional physical fitness coupled with early pioneering use of sports science, strict discipline and a doctrine of all-out attack on the field, Cullis's kick and rush method incorporated long passes and speed of execution, hitting the opposition penalty box faster and more frequently to apply the percentage principle to goalscoring.

Up to the period of his leaving England he had been mainly influenced by the Dutch genre-painters, whose technique he had carefully studied, whose works he frequently kept beside him in his studio for reference as he painted, and whose method he applied to the rendering of those scenes of English and Scottish life of which he was so close and faithful an observer.

They are full of both grace and individuality ; the features show excellent draughtsmanship ; and the flesh-painting is firm and sound in method, though frequently tending a little to hardness and opacity.

If the victim were dragged slowly, his weight might lower him sufficiently to miss the barnacles, but this method would frequently result in his drowning.

Indulging in sleep too late in the morning, is an almost certain method to bring on the paroxysm, and the more frequently it returns, the greater strength it acquires ; the propensity to sleep at this time is almost irresistible.

The best way to determine the correct figure ( in captives ) is by direct observation of pairs isolated from birth, a method that produced surprising results: maturing of a male Indian python in less than two years, his mate in less than three ; ;

Figures 5 and 6 are examples of our method of analyzing the results for each growth center.

The instrumental method, however, is about 100 times more sensitive and yields numerical results which can be accurately repeated at will over a period of time.

The discovery and elucidation of aberration is now regarded as a classic case of the application of scientific method, in which observations are made to test a theory, but unexpected results are sometimes obtained that in turn lead to new discoveries.

A study found that the patented method called Circulator Boot achieved significant results in prevention of amputation in patients of diabetes and arterioscleorosis.

The down side of this method is that it is difficult to achieve as good results of glycemic control as with intensive insulinotherapy.

Most production crankshafts use induction hardened bearing surfaces, since that method gives good results with low costs.

A competitive ' market ' for schools eliminates the need to otherwise attempt a workable method of accountability for results.

An FFT is any method to compute the same results in O ( N log N ) operations.

Hollerith's method was used in the 1890 United States Census and the completed results were "... finished months ahead of schedule and far under budget ".

Fresnel used a zone construction method to find approximate values of K for the different zones, which enabled him to make predictions which were in agreement with experimental results.

If this is not accounted for, results can be erroneously attributed to the phenomenon under study rather than to the method of sampling.

* Mode ( computer interface ), distinct method of operation within a computer system, in which the same user input can produce different results depending of the state of the system

In addition to Barrow ’ s original method, both non-aqueous-employing organic solvents-and vaporous-the Library of Congress ’ DEZ ( diethyl zinc ) treatment-methods of achieving the same results have been researched in an attempt to reduce time, labor, and cost requirements.

Equally important, the location of the economists in the Federal Reserve has had a significant influence on the kind of research they do, biasing that research toward noncontroversial technical papers on method as opposed to substantive papers on policy and results.

However, Western occult practice mostly includes the use of astrology ( calculating the influence of heavenly bodies ), bibliomancy ( reading random passages from a book, such as Liber Legis or the I Ching ), tarot ( a deck of 78 cards, each with symbolic meaning, usually laid out in a meaningful pattern ), and geomancy ( a method of making random marks on paper or in earth that results in a combination of sixteen patterns ).

Clusters such as the Pleiades, Hyades and a few others within about 500 light years are close enough for this method to be viable, and results from the Hipparcos position-measuring satellite yielded accurate distances for several clusters.

The philosophy of medicine began to deviate somewhat from scientific method and an emphasis on repeatable results in the very late 20th century by embracing population thinking, and a more pragmatic approach to issues in public health, environmental health and especially mental health.

The hourglass model starts with a broad spectrum for research, focusing in on the required information through the method of the project ( like the neck of the hourglass ), then expands the research in the form of discussion and results.

Haldeman also discusses the covert sensitization method, which involves instructing patients to imagine vomiting or receiving electric shocks, writing that only single case studies have been conducted, and that their results cannot be generalized.

This method results in the creation of transistors with reduced parasitic effects.

Sophie had derived the correct differential equation, but her method did not predict experimental results with great accuracy, as she had relied on an incorrect equation from Euler, which led to incorrect boundary conditions.

* The athlete entering the circle, then exiting and re-entering it prior to starting the throw results in a foul ( all the rule books allow an athlete to leave a circle prior to starting a throw, but this still counts within the one minute time limit ; the allowable method of exiting the circle varies by rule book ).